Carburetor for internal-combustion engines



June 3, 1930. f c. H. CLAUDEL CARBURETO FOR INTERNAL GOMBUSTION ENGINES2 Sheets-Sheet Filed Deo. 1,1, 1924 IIIIIII June 3, 1930,

c. CLAUDEL CARBURETOR FOR INTERNAL COMBUSTION ENGINES g Sheets-Sheet 2Filed Dec. ll, 1924 Patented luide13,4193@ i Unirse sra-rssearan'rorricr. Y 7

CHARLES'HENRI CLAUDEL, or NEUILLY-sun-sarivn, FRANCE? I CAR-BURETOB FORINTERNAL-COMBUSTION ENGINES Y .Appli'catian ianeqemberii, A1924i, serialNo. 755,299, and in France october e4, 1924. Y

The present invention relates to carburetors for internal combustionengines fand has for its object to render the essential parts of acarburetor readily accessible and` readily removable and replaceable, sothat theyV may be inspected and cleaned v with great facility.`

According Ato, the invention va carburetor, comprising a 'system ofnozzles communicating freely with an air inlet passage and carried by aremovable hollow connecting member `fitting tightly into afloat chamber,is provided,'in` which the vfloat chamber and the body ofthe carburetorcontaining the air inlet passage are in one piece the connecting Vmember which isadapted to engage Ywith i' the body containing .the airinlet passage without being secured therein beingsecured to the oatchamber by an assembling bolt traversing the chamberjaxially and capableof being dismounted without removing the Y float annularly disposedar-ound the bolt'.V

, According to a further feature of the invention the assembling bolt,which isl also utilized vfor securing the cover of the float chamber inposition as has previously been proposed, contains axially arrangedtherein la screw having, at its lower end, a fuel passage, which,contrary to known arrangements, is not regulated by a needle or anyother valve but is constituted by av calibrated orifice adapted tocontrol, the supply of liquid fuel from the float chamber. Still furtherfeatures of the invention will be apparent from the followingdescription and will be set out arated or dismounted. y Figure l isasectional view on the line (3,1) of Figure 1, showing theslowspeedregulating screw; and Figure 5 5y is a plan view of the devicedrawn tothe same scale as Figure 2; FigurelfL is a View l50 illustratmga portion of Figure'l on a larger scale.

Y Figure 6 is a view illustratinganother por-i` i tion of Figure 1.Figure 7 is an axialy sectional view of a portion of a -modiiiedfform ofthe device in which the calibrated slow-speed lorifice is situated at apoint between the axis of the nozzles and theV float chamber, and isthus made more readily accessible; Figures 8 and 9vare partly sectional:views of modified 60 forms ofthe device in which the calibratedslow-speed orice is transferred to the centre line of the float chamber,or close to the same, in order that it -shall'be unaifected byvari'ations inthe inclination of the carburetor, 65 While being suppliedthrough themain cali, brated orice and being removable independentlyofthe latter. Figure lOillustrates a device in which the calibrated,slow-speed orice, which is coaxial 'with the main cali- 7D bratedorifice, is removable together with the latter.

Referring now to Figures 1 vto 6, it will be seen that a carburetingchamber l, ioat chamber 2 and atmospheric inlet passage 3 arey vformedina single piece. Y, A fuel nozzle device 1s connected withthe 'floatchamber by means of a member 5 having'l va suitable connectingtub'e 5provided therein. The member 5 vserves to support thelncz- 80 zle deviceand is secured in position by means of a special assembling bolt 6disposedalong the centre line of the float chamber, this bolt alsoserving to secure a rotatable cover?V com-V prising a pipe couplingdevice 13 for the ad- 85 mission of liquid fuel to the Vfloat chamber, afilter 14 and needle valve 15 controlledV by a float 16. yThe bolt 6 ishollow and contains a' p screw 8 having a milled head at vits upperlendandvshaped at'itslower end as illustrated in 90 einem Figure 1a. rlhescrew 8 is provided with a head t having an internal chamber into whichthe fuel flows from the float chamber, through lateral orifices 9 formedin the bolt 6, and through'the annular space l etween this bolt and thehead t and through the orifices 9 provided in the walls of the latter.rllhe head t cooperates with a seat formed in the lower bored part ofthe bolt 6 below the orifices 9, and a calibrated oriiice 10 is formedin this head. When the head t rests on its seat, liquid fuel is suppliedto the tube 5 in the member 5 and consequently to the fuel nozzle devicewhich comprises a normal speed nozzle 17 and the slow-speed nozzle 11,the latter being su plied through a calibrated slow speed orifice 11',The slow speed nozzle device is secured by a member 12 removably mountedin the member 5, as shown in Figure 3. rlhe normal speed nozzle 17 isscrewed into an element having a hexagonal portion 4t as-illustrated inFigure 3, which contains the conduits of theV main fuel nozzleand isscrewed into the support 5. The whole device comprising the nozzle 17can thus be removed together with the member 5by detaching the bolt G,and can then be separated if desired from the member 5 by unscrewing theelement comprisingl the hexagonal portion 4l.

A tapered element 21 serving to correct the air supply is controlled byan externalk handle 22 and is guided atits lower end by a tube 24screwed or otherwise secured to the air inlet 3, and in view of thisconstruction, the. noz-` `zle:17 can readily be removedor replaced.

The air supply at. slow speed isregulated bymeans of a double screw(Figs. 1 and 4.). A screw 19 with milled head 19 is screwed into thebody of the carbureting chamber 1,r

. 20', the end of the screw being movable lengthwise so as to close moreor less a passage extending centrally through the barrel for theadmission of air when operating at slow speed,.that is, in the closedposition of the barrel 18.

A particular feature of the invention con sists in the jointprovidedbetween the Hoat chamber 2 and the support 5 whereby the devicemay be cleaned by emptying the said chamber. As shown in Figs. 1 and 5,the socket 25 of the support 5 entering the aperture in the bottom ofthe chamber 2 is provided with a plurality of longitudinal grooves 25';the joint between the main body 5 and the chamber 2 is made fluidtightby a paching washer 2G which is tightened by means of the screw 6. TheAfloat chamber can be cleaned by loosening said screw, whereby theliquid in the bottom of the chamber together with all the impuritieswhich it contains will flow out through the grooves 25.

It will be noted that the screw 8 together with the main calibratedorifice 10 can be inspected or replaced and may even be removedv if thebarrel 18 is in the closed position, while the engine continues to runat slow speed, since combustible iiuid-is freel supplied through thepassage in the support 5 to the oriice 11 of the slow speed nozzle 11.

The cover owing to its particular construction may be removed for theinspection of the chamber merely by removing' the bolt 6, i. e. evenduring the slow speedrunning.

As shown in Figures 1 and 6 the apparatus may be enabled' to: operateinthe most favorable conditionsat low temperatures. The connectingtube15f'wvithin-the support 5 is surrounded by a free space 28 forming a'jacket for the circulation' ofa heat-ing agent which enters through theVorifices 29, 29 and is discliargedthrough theorifice 30. It will beobserved thatthe conduit connecting; the main calibratedzorifice withthe fuel nozzle as weil asthe .baseof the fuel. nozzle, will be the onlyparts heated by the small quantity of. heating. fluid, which mayconsist` of the water or the. cooling. mediuinservingto cool the engineto. which the carburetor is supplying. combustible mixture, or. of thewater or other fluid whichv has: been: heated by contact with theexhaust. piping.V

SinceV the iioat chamber'itself. is-not heated. it will continuev tooperate normally even: when the temperature ofthe heating medium risesto. an abnormal extent.. Furthermore, since the. nozzle device itself isheatedby direct conductionffrom itsbase, the device is not liable tobeffrozen'.Y Y A A Fig. 7 shows a modiiication. iny whichy thecalibrated slow-speed'oriice is situated-at 11a, while theslow speedfuelnozzle 1.1A as the. construction above describcd'pis disposed coaxiallywith the suction? conduit. The: calibrated. orifice lla is situated atthe endf of a bolt 81, which is constructe'dlin. an analogous manner tothe bolt 8 shown iniFig. l and in order to change. the said calibratedslow-speed ori.- ticev it is only-necessary to-remove the bolt 31.

Figs. 8` and 9 show further'modifications' in which the calibratedorifice 11G, is situated upon or ne'arf the centre line ofthe floatchamber so that its output will be unaffected in the same'mannerasth'aft of the main. calibrated orifice by any inclined positionsassumedby the apparatus. in Fig. 8,- the support 5 comprises two` ductsv38 andl 3l; the: duct 33 connects the main calibrated orificev l0 withthe compound nozzle 17, andtheduct 3l connects the slow-speed:calibrated oriice. llb with the slow-speed sprayer l1 gthecalibratedorifice 11:1, iscarriedA by a low-speed nozzle 11'; the calibratedoriicc 11"bl1ieing formed in the screw 32. which iscoaxial with the saidchamber, while:thernodication'.ile4

lil)

lustrated in Fig. 9 consists simply in that'the screw 32 is disposed ina horizontal position,

In these two figures, as well as in the preceding, the two calibratedorifices can be remove-d separately, and may be arranged 1n series, asshown, or in parallel, so that the main orifice may be changed while themotor is run-v ning at slow speed.

F ig. l0 shows an arrangement in which the calibrated slow speed orificeis removable at the same time as the main'orifice 10. For this purpose,the bolt 6 has for instance a recess 35 formed in its lower portion, aplug 36 having the calibrate-d slow speed orifice 1lb formed thereinbeing slidably disposed in this recess, and held by a 'spring 37 upon aseat which separates the two ducts 33 and 34. To provide for the removalof the plug 36 together with the main orifice 10a detent pin 38 forms asupport for the plug 36, so that the latter ismaintained in its recess,attached to the screw 6, and may thus be removed with the latter.

Obviously the arrangements hereinbefore set forth are applicable toother types of carbureting devices, such as those comprising Vbutterflythrottling devices or the llike and fuel nozzles disposed in series asshown or in parallel. Y

j What I claim and desire t0 secure by Letters Patent is: Y f

l. A carburetor comprising` in combination, a carburetor body and floatchamber solidly joined together,aremovable cover cap fork said floatchamber,` a removable hollow connecting member fitting tightly on oneside within the bottom of said ioat chamber and laid on other side onthe bottom of said carburetor body, a removable hollow assembling boltfitted through said cover cap and the float and screwed in thecorresponding end of said hollow connecting member and a system of spraynozzlescarried by the other end of saidhollow connecting member and eX-tending into the vaporizing chamber of the carburetor through a suitableorifice.

2. A carburetor comprising in combination, a carburetor body and floatchamber solidly joined together, aremovable cover cap for said floatchamber,`a removable hollow connecting member fitting tightly on oneside within the bottomof said float chamber and laid yonother side onthe bottom of said carburetor body, a removable hollow assembling boltfitted through said cover cap and the float and screwed inthecorresponding end of said hollow connecting member and a system of spraynozzles carriedby the other end of said hollow connecting member andextending into the vaporizingchamber of the carburetor through asuitable orifice, a removable boltprovided inside said hollow assemblingbolt and a calibrated `main orilice provided inthe lower part of saidinner bolt positional between the interior ofthe niovable ioat chamberand the hollowpart of saidk connecting member.

3. A carburetor comprising inrcombination, a lcarburetor-body and floatchamber solidly' joined together,'a removable cover cap for said floatchamber, a removable hollow connecting memberA fitting tightly on oneside within thebottom of said float chamber and laid on other sideronthebottom of said carburetor body, a removable -lhollow kassembling bolt`fitted through said cover cap and the fioat-and screwed in thecorresponding end of said hollow connecting member, a main spray.nozzleremovably connected to the other end of'said hollow connectingmember n and extending into the vaporizingV 'chamber of the carburetor,and a separately tending into the vaporizing chamber of the carburetor,and a separately removable slow speed spray nozzle lodged axially withinsaid main spray nozzle, and a tubular vsection secured to the vaporizingchamber around saidmain nozzle, and an air controller slidably mountedon said tubular section and said main nozzle.

5. A carburetor comprising in combination, a carburetor body and ioatchamber solidly joined together, a removable cover cap for saidfioatchamber, a removable hollow connecting member fitting tightly onone side within the bottom of said float chamber by a socket'providedupon said connecting member and laid onother side on the bottom of thecarburetor body, peripheral grooves upon thek outerfaces of said socket,a rehollow assembling bolt fitted through said cover cap and the floatand screwed. in the corresponding end of said hollow connecting memberand a system of one side within the bottom of said floaty chamber andlaid on other side on the bottom of said said carburetor body, aheating` jacket in sadeonnectng member, L removable hollow assemblingbolt tted through Said cover Cap and the float and screwed in thecorresponding end of said hollow conmeeting member and a system of spraynoz- Zles carried by the other end of said hollow connecting member andextending into the vaporzng chamber of the carburetor through asuitable. orifice.

In testimony whereof I have hereunto set my hand.

CHARLES HENRI. CLAUDEL.

